Deriving Formula for Sum of a Geometric Progression

[ricardovergara]

The man is an excellent teacher, the change in his voice's pitch is alone to keep the class awake and engaged. You're a rare breed Professor.

[tensaijuusan]

I am 64 years old and I wish you had been by mathematics teacher. A good explanation and understanding of how a formula is derived rather than just a dry presentation of its mechanism can really turn on a light bulb for so many students.

[esthero]

What is really amazing about Eddie's classes is that he gives his students the chance to experiment with different ways of trying to solve the problem instead of just giving them the answer. That way they understand why the wrong method didn't work and why the right one did.

[buzz_is_here]

Dude, I'm a software developer, went through (admittedly only) one year of CS UNI and this is still the best lesson on GS I've seen yet. Thank you!

[microhoarray]

Oh my goddd this is brilliant. They always forced us to memorized

[rach]

saving my maths a level grade one video at a time thank you!

[craighennessy]

I wish I had teachers at school with a tenth of your passion for teaching, i would have been a much better student. Brilliant stuff keep it up Eddie!

[eshabaweja]

Watched this back in 2017 for school, watching it again in college while solving recursion trees :)

[qtkd]

ive been looking how to get that simple formula from SUM. Thank you so much!!

[JulianGonzalez-ejfi]

This lecture is important compared to most of the other ones because I came across this video about after 6 videos, that did not care to explain why we subtract Sn and rSn. Thank you for explaining that.

[Someone-zxxd]

I really feel like I am stupid. Why was I not able to figure out this simple proof even after thinking for many days?

[crisgwyngieponferrada]

I'm a teacher. And I get ideas from you. Thank you.

[arcadegamingpro]

Wow great explanation sir really from now you are only my new online Math teacher ☺☺😊 thanks alot watching from INDIA.

[thehungryinvestor]

Absolutly lovely way of explaining, may you make more and more videos explaining things so easily and in a fun way. These kind of teachers actually add value in the life of students, thanks for being a teacher like you are :) :).

[commenter]

I waited 14 years to go to college, and these videos really help me. I have a book, but it couldn't be a bigger piece of crap even if the pages were made of crap and those were printed on with ink made of crap. Even if they used glue made of crap to bind the book, covered it in packaging made of crap, and put it in a box made of cardboard, it still couldn't be a bigger piece of crap. With how many steps they skip in the examples and explanations, a professor would dock points if he were grading it, yet we're supposed to follow along trying to learn new concepts.

In summary, I am quite dissatisfied with my calculus textbook.

[hhtan]

What is the meaning "the whole things will collapse when multiply by r?" And why minus r(Sn) by Sn will get the sum of it? It's seem like counter intuitive because how the first person that create this formula will know that multiply by r and subtract them will get the answer?

[ProofDetectives]

Thank you for your explanation. Have a good day.

[maxwellsequation]

Me who tried deriving it with summation function and did in an hour, seeing him do it in some minutes : 😧😧

[jaym]

Sir, I thought we add terms when doing the process of elimination. Why are both positive terms in the sequence, ar and etc., canceling each other out? I am still slightly confused on this.

I sincerely give my thanks for these videos. We are just given formulas to memorize and often not taught why and how they work. I understand that when my school days are over I may not remember the formulas. These videos truly help with that.

[uniquemathematicsclassesdo]

Please define one example where use GP concept in my daily life, I have an interest about this topic
Thanks